80Nm I'm pretty sure this is the answer if I'm wrong I'm sorry but I'm positive it the answer
Answer:
a compound
Explanation:
a compound consists of two or more elements combined
Answer:
In 1827, Brown observed, using a microscope, that small particles ejected from pollen grains suspended in water executed a kind of continuous and jittery movement, this was named “Brownian motion”. ... This random movement of particles suspended in a fluid is now called after him.
Explanation:
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